Look, the reason MS even invested in these territories throughout '05 - 2010 was specifically so they could stem the tide of defacto exclusives Sony was getting as a result of being relevant in those regions. Sure, 360 was far behind PS3 in JP, but JP devs still saw the platform as worthwhile to release on for almost all of their endeavors last gen. Now that MS has regressed their support in that region, they have lost a large chunk of the 3rd party support they were getting on the 360, and Sony is now getting exclusives at almost no cost to them.
Its a matter of optics, and if MS isn't going to put in work to get JP devs to consider releasing on their machine, which is profitable in 2 western regions that they are relevant in, then this problem where devs just continue to focus on PC/Playstation/Nintendo is just going to continue to create questions around the topic of MS relevancy in the gaming sector outside of being an OS/API supplier.